Solenoid-Driven Metering Pumps - ProMinent Canada

The gamma/L is a diaphragm-type, solenoid-driven, microprocessor based metering pump with maximum
capacities to 8.4 gph (32.0 L/h) and maximum backpressure to 290 psig (20 bar).
ProMinent ® solenoid-driven metering pumps consist of two main components: the pump drive unit and the
liquid end.
Drive Unit
The pump housing is constructed of fiberglass-reinforced PPE plastic to protect against corrosion, dust,
and water.
The solenoid drive unit houses a short-stroke solenoid with a maximum stroke length of 0.05” (1.25 mm). It is
equipped with a noise suppressing mechanism for quiet operation and the armature is the only moving part.
Operating on pulse action, each pulse generates a magnetic field in the solenoid coil. This magnetic field
moves the armature, which in turn moves the diaphragm. The diaphragm pushes into the dosing head and
cavity forces chemical out of the discharge valve. When the magnetic field is de-energized, a spring returns
the armature and diaphragm to their original position. This return movement draws chemical into the dosing
head cavity through the suction valve.
In the event of a diaphragm rupture, the liquid end has a weep hole on the bottom of the backplate to direct
chemical out of the pump and away from the solenoid. An optional diaphragm failure detector can be used
to stop the pump and indicate a fault.
The stroke-length adjusting mechanism is connected directly to the solenoid. Adjustment results in an
accurate self-locking stroke-length setting.
Diaphragm
01/01/2012 - gamma/ L
ProMinent ® gamma/ L
Solenoid Diaphragm Metering Pumps
Overview: gamma/ L
The diaphragm is constructed of
fabric-reinforced EPDM elastomer with a plastic core and PTFE-facing. It is chemically resistant to virtually
all process fluids and can be used over a wide temperature range. The gamma/ L pump is designed with a
convex diaphragm. The curved shape
provides precise metering and alleviates stress placed on the diaphragm by reducing liquid end dead
volume.
Cutaway view of ProMinent gamma/ L solenoid-driven metering pump
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1. Housing
2. Liquid end
3. Diaphragm
4. Backplate
5. Solenoid
6. Solenoid coil
7. Solenoid axle
8. Armature
9. Cover
10. Stroke adjustment screw
11. Stroke adjustment axle
12. Stroke adjustment knob
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